[1] Mem Sloan Kettering Canc Ctr, Head & Neck Serv, 1275 York Ave, New York, NY 10021 USA
[2] Royal Edinburgh Infirm, Dept Otorhinolaryngol Head & Neck Surg, Edinburgh, Midlothian, Scotland
[3] Massachusetts Eye & Ear Infirm, Div Thyroid & Parathyroid Endocrine Surg, Dept Otolaryngol, Boston, MA USA
[4] Univ Chicago, Dept Surg, Chicago, IL 60637 USA
[5] Univ Chicago, MacLean Ctr Clin Med Eth, Chicago, IL 60637 USA
[6] Univ Texas MD Anderson Canc Ctr, Head & Neck Endocrine Surg, Houston, TX 77030 USA
[7] AC Camargo Canc Ctr, Dept Otorhinolaryngol Head & Neck Surg, Sao Paulo, Brazil
[8] Univ Sao Paulo, Dept Head & Neck Surg, Med Sch, Sao Paulo, Brazil
[9] Inst Gustave Roussy, Dept Otolaryngol Head & Neck Surg, Villejuif, France
[10] Lab Phonet & Phonol, Paris, France
[11] Mayo Clin, Dept Otorhinolaryngol, Rochester, MN USA
[12] Hosp Univ Cent Asturias ISPA, Dept Otolaryngol, Oviedo, Spain
[13] Univ Oviedo IUOPA, Oviedo, Spain
[14] CIBERONC, Head & Neck Canc Unit, Madrid, Spain
[15] Univ Hosp Leuven, Dept Otorhinolaryngol Head & Neck Surg, Leuven, Belgium
[16] Sect Head & Neck Oncol, Dept Oncol, Leuven, Belgium
[17] Univ Helsinki, Dept Otorhinolaryngol Head & Neck Surg, Helsinki, Finland
[18] Helsinki Univ Hosp, Helsinki, Finland
[19] Univ Antioquia, Sch Med, Dept Surg, Hosp Univ San Vicente Fdn, Medellin, Colombia
[20] Univ Oviedo, Inst Invest Sanitaria Principado Asturias, ISCIII, Oviedo, Spain
[21] Univ Oviedo, CIBERONC, ISCIII, Oviedo, Spain
[22] Univ Hosp Santa Creu & St Pau, Dept Otolaryngol Head & Neck Surg, Barcelona, Spain
[23] Univ Autonoma Barcelona, Dept Surg, Barcelona, Spain
[24] Univ Miami Miller, Dept Otolaryngol Head & Neck Surg, Sylvester Comprehens Canc Ctr, Sch Med, Miami, FL USA
[25] Southern Illinois Univ, Dept Otolaryngol Head & Neck Surg, Sch Med, Springfield, IL USA
[26] Jena Univ Hosp, ENT Dept, Jena, Germany
[27] UC Louvain, Dept Head & Neck Surg, St Luc Univ Hosp, Brussels, Belgium
[28] King Albert II Canc Inst, Brussels, Belgium
[29] Univ Udine, Sch Med, Udine, Italy
[30] Int Head & Neck Sci Grp, Padua, Italy